| Global Health Research Limited | Professional & scientific | 2013 |
| Global Properties South Ltd | Real estate | 2018 |
| Global Rhinology Network CIC | Health & social care | 2020 |
| Global Travel Wessex Limited | Extraterritorial | 2003 |
| Global Work Experience Ltd | Administrative & support | 2016 |
| Global Yachts Limited | Professional & scientific | 2015 |
| Globaltech Support Ltd | Construction | 2006 |
| GLP (Consultancy) Limited | Professional & scientific | 2014 |
| GLS Design (Holdings) Limited | Professional & scientific | 2019 |
| GLS Design Limited | Other services | 1989 |
| GLS Events Limited | Other services | 2009 |
| Glutrition Limited | Extraterritorial | 2017 |
| Glyn Williams (Southampton) Limited | Other services | 2012 |
| GM Diesel Services Limited | Other services | 2024 |
| GM Groundwork Services Limited | Construction | 2022 |
| GM Injector Services Limited | Wholesale & retail | 2024 |
| GM Lifting Limited | Administrative & support | 2002 |
| GM Lifting Services Limited | Administrative & support | 2016 |
| GM Welding & Fabrication Limited | Manufacturing | 2025 |
| Gmandco Trading Limited | Professional & scientific | 2017 |
| GMF Engineers Limited | Financial services | 2013 |
| GN Global Consultancy Ltd | Professional & scientific | 2022 |
| GNS Metalworks Ltd | Manufacturing | 2019 |
| Go Mortgage Financial Services Ltd | Financial services | 2022 |
| Gobig Software Group Limited | Professional & scientific | 2023 |
| GODIGITAL2ACHIEVE Ltd | Wholesale & retail | 2024 |
| Goditech Ltd | Information & communication | 2025 |
| Gold Factory (HW) Limited | Other services | 2015 |
| Gold Factory (Slough) Limited | Other services | 2015 |
| Goldcrest Apartments Limited | Real estate | 2012 |
| Golden Eastleigh Ltd | Other services | 2023 |
| Goldenserve Restaurant Ltd | Real estate | 1999 |
| Goldfinch Life Ltd | Construction | 2020 |
| Goldhawk Productions Limited | Information & communication | 2005 |
| Goldilocks Solutions LAB Limited | Health & social care | 2025 |
| Goldleaf Treeworks Ltd | Administrative & support | 2022 |
| Goldlink Agencies Ltd | Information & communication | 2010 |
| Goldsmith Consultancy Limited | Professional & scientific | 2023 |
| Good Faith Gardens Ltd | Administrative & support | 2026 |
| Good Life Computer Services Limited | Information & communication | 2023 |
| Good Luck Chinese Takeaway Limited | Hospitality | 2006 |
| Goodman Construction Ltd | Construction | 2015 |
| Goodmiles Limited | Professional & scientific | 2023 |
| Goodrington Property Ltd | Real estate | 2019 |
| Gophysio Limited | Health & social care | 2004 |
| Gorilla (UK) Ltd | Construction | 2008 |
| Gorilla Solutions Limited | Administrative & support | 2018 |
| Gornal Self Storage Ltd | Transport & logistics | 2017 |
| Gosport Holdings Limited | Professional & scientific | 2009 |
| Gosport Metal Treatments Limited | Manufacturing | 1968 |
| Goulden Consulting Ltd | Information & communication | 2024 |
| Gouranga Gauri Limited | Health & social care | 2010 |
| Gover Ruis Investments Limited | Real estate | 2022 |
| GP Broadcast Engineering Ltd | Professional & scientific | 2006 |
| GP Health Ltd | Health & social care | 2024 |
| Grace to Restore Ltd | Health & social care | 2019 |
| Gracie Belle Properties Limited | Real estate | 2024 |
| Gradlon Limited | Construction | 1959 |
| Graesar Ltd | Real estate | 2021 |
| Graftertech Ltd | Information & communication | 2025 |
| Graham ASH Architects Limited | Professional & scientific | 1995 |
| Grahams Surveying Ltd | Extraterritorial | 2018 |
| Gralen Ltd | Professional & scientific | 2021 |
| Grand Brand Plans Ltd | Other services | 2023 |
| Grand Facilities Management Ltd. | Administrative & support | 2019 |
| Grandcrown Property Solutions Ltd | Real estate | 2025 |
| Grandon Brickwork Limited | Construction | 2010 |
| Grandon Mechanical Limited | Manufacturing | 2018 |
| Grangelands Services Limited | Administrative & support | 2008 |
| Grant Global Company Ltd | Information & communication | 2025 |
| Grappenhall Investments Limited | Real estate | 1997 |
| Gravesend Coldharbour Road Management Company Limited | Real estate | 2018 |
| Greek Servings Limited | Hospitality | 2021 |
| Green & Sons Solutions Ltd | Construction | 2024 |
| Green ALL Over Ltd. | Wholesale & retail | 2017 |
| Green Channel Ltd | Wholesale & retail | 2007 |
| Green Clean Group Ltd | Financial services | 2024 |
| Green Creed Ltd | Administrative & support | 2016 |
| Green DOT Plumbing Ltd | Construction | 2012 |
| Green Dragon Takeaway Limited | Hospitality | 2022 |
| Green Drake Limited | Financial services | 2013 |
| Green Energy Electrotechnical Services Limited | Other services | 2025 |
| Green Flow Energy Systems Ltd | Energy | 2023 |
| Green Grass Media Group Ltd | Professional & scientific | 2025 |
| Green Horizons Ltd | Administrative & support | 2001 |
| Green Landscape Studio Limited | Professional & scientific | 2022 |
| Green Mead Farm Limited | Agriculture & fishing | 2021 |
| Green Smile Ltd. | Administrative & support | 2009 |
| Green Sweeps of Hampshire Ltd | Administrative & support | 2017 |
| Greendeal Property Management Limited | Households | 1984 |
| Greener Lighting Ltd | Manufacturing | 2023 |
| Greenfield PPS Limited | Administrative & support | 2003 |
| Greenfields Consultancy Limited | Information & communication | 1997 |
| Greenfields Farm People Limited | Other services | 2019 |
| Greenhouse Properties Sussex Ltd | Real estate | 2026 |
| Greenlane Health Care Ltd | Public administration | 2026 |
| Greenlight Supported Housing Limited | Real estate | 2025 |
| Greensands Management Services Ltd | Water & waste | 2025 |
| Greenspace Sustainable Financial Planning Ltd | Financial services | 2020 |
| Greenstocks (Broadway) Ltd | Hospitality | 2024 |